HVDC Divider - Trench Voltage... · HVDC Divider Compensated voltage divider for HVDC transmission...
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HVDC Divider Compensated voltage divider for HVDC transmission systems Version 03 2012
Transcript of HVDC Divider - Trench Voltage... · HVDC Divider Compensated voltage divider for HVDC transmission...
HVDC DividerCompensated voltage divider
for HVDC transmission systems
Version 03 2012
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RC Divider design
Type RC 500-V
Composite Insulatorwith: SF6 Gas
Mineral Oil
Type RC 200 N
Porcelain Insulatorwith: Mineral Oil
Type RC 60-V K
Composite Insulatorwith: SF6 Gas
Mineral Oil
Type RC 500 GIS
Steel tankwith: SF6 Gas
DCB3
DCB4
DCB2
DCB1
DCB-BOXDivider Connection Box
AD
A
For measuring of high DC voltage at HVDC-transmission systems, compensated resistive voltage divider (RC-Divider) are in use. This design ensures a wide bandwidth from DC to several kHz with a fast response to voltage changes. The output voltage signal can then be processed individually. The resistive component is made of high-precision low inductance resistors, connected in series according to the primary rated voltage and the defined measuring current. To protect the RC-Divider against transients and to facilitate ripple measurements of the DC voltage or measuring frequencies up to some kHz, grading capacitors are connected parallel to the resistors. The characteristic of the precision RC Divider is high accuracy, high thermal- and voltage stability, exact linearity, very short response time and newest high technology. Each RC-Divider will be designed especially to the electrical and mechanical requirements of the DC system.
Divides the primary voltage to an interme-diate voltage. A double shielded cable transmits the signal to the DCB-Box. The DCB-Box divides the intermediate voltage to the secondary voltage. • transmitting over long distance• very fine calibration of the exact ratio• protected against EM-waves
Divides the primary voltage direct to the secondary voltage. Into the secondary box takes place a direct conversion to a digital or light signal.• Individual transforming, transmitting and
analysing of the secondary signal• Insensitivity against guided EMC-waves• Ratio is independent to external burden
Divides the primary voltage to an interme-diate voltage. The 4 DCB-Boxes divide the intermediate voltage to different secondary voltage outputs.• same advantages decrypted see above• multiple independent measuring
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Technical Data
Artificial Pollution Test According IEC61245Solid layer method with SDD of 0.04 mg/cm2
at – 525kV DC
Seismic Qualification Test According IEC 60068 and U-SD1, Rev. 5; 1.0gwith horizontal acceleration of 1g at first own frequency
Type Test According IEC 60 at High VoltageLaboratoryDuring withstand voltage test at +1200 kV DC
Rated primary voltage range VN 1 kV to 800 kV Rated current IN 1 mA or 0.5 mA Typical accuracy nDC 0.4% to 1% measured
0.1% calculated by means of the separate measured elements
Temperature coefficient TC 15 ppm / °C Voltage coefficient VC 1 ppm / °C Accuracy depending on temp. range 0.02 % (-40°C to +50°C) Long time stability of the divider accuracy 0.002 % / Year Step response time S < 33 s Frequency response ( 3dB) F > 10 kHz Maximum length of the divider 9000 mm (Porcelain housing)
9900mm (Composite housing) Shed form according (IEC with max 4.0) Alternated sheds or regular sheds Mounting Indoor / Outdoor Mechanical strength (depends on equipment height)
Normal application max. horizontal acceleration 0.5g Special application max. horizontal acceleration 1g
Routine Tests Type Tests Measurement of the resistance and capacitance Lightning impulse voltage test
DC voltage withstand test, dry Switching impulse voltage test
AC voltage withstand test Polarity reversal test
PD measurement with AC voltage DC voltage withstand test, wet
AC voltage withstand test on the low voltage tap RIV measurement
Measurement of the DC- and AC-ratio Step- and Frequency response measurement
Tightness test Temperature rise test
Since there is no standard existing for RC divider, we define the Routine Tests and Type Tests based on our long experience together with our customers. There can be variations in the extend of the tests.
www.trenchgroup.com
Trench France SAS 16, rue du Général CassagnouB.P. 80070F-68302 Saint Louis Cedex, FrancePhone + 33 3 89 70 23 23Fax + 33 3 89 67 26 63E-Mail [email protected]
Phone +44 191 483 4711Fax +44 191 430 0633E-Mail [email protected]
Product Manager RC Divider:Christian WeberPhone + 33 3 89 70 35 94E-Mail [email protected]
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